Automobile antenna system

• US 4,717,920 A
• Filed: 11/26/1985
• Issued: 01/05/1988
• Est. Priority Date: 11/27/1984
• Status: Expired due to Term

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kondo, Hiroshi, Ohe, Junzo
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Wise, Robert E.
• Application Number:
  US06/801,770
• Time in Patent Office: 770 Days
• Field of Search: 343/711, 343/712, 343/713, 343/866, 343/842, 343/788
• US Class Current: 343/712
• CPC Class Codes: H01Q 1/3283 side-mounted antennas, e.g. bumper-mounted, door-mounted mounted on windscreens H01Q1/1271
• CPC Class Codes: H01Q 7/06 with core of ferromagnetic material H01Q7/02 takes precedence

Abstract

An automobile antenna system integrally mounted on the vehicle body detects the high-frequency surface currents induced on the vehicle body by broadcast waves. The antenna system includes a high-frequency pickup having a loop antenna and a core around which the loop antenna is wound. The pickup is secured to a predetermined position of the vehicle body by fixture means, and a predetermined side of the loop antenna is opposed to a marginal edge portion of the vehicle body.

Claims

1. An automobile antenna system comprising:

high-frequency pickup means having a loop antenna longitudinally disposed along and in close proximity to an end surface of a marginal edge portion of a vehicle body, a core being formed of a material having a high permeability constant value and around which said loop antenna being wound, and a casing having an opening opposite to one side of said loop antenna;

said high-frequency pickup means being provided for detecting high-frequency surface currents which are induced by broadcast waves on the vehicle body and which are concentrated on the marginal edge portion of the vehicle body; and

fixture means for securing said high-frequency pickup means to a predetermined position of said vehicle body.

2. An automobile antenna system according to claim 1, wherein a grooved portion around which said loop antenna is wound is provided on at least one side surface of said core, and said marginal edge portion of the vehicle body is inserted into said grooved portion.

3. An automobile antenna system according to claim 1, wherein said fixture means comprises:

a pair of brackets for clamping said high-frequency pickup means at two sides thereof, each of said brackets having one end thereof rigidly fastened to said marginal edge portion of the vehicle body; and

a vehicle body connecting piece which is cut out from the vehicle body and to which said pair of brackets clamping said high-frequency pickup means therebetween are secured such that said loop antenna of said high-frequency pickup means opposes said marginal edge portion of the vehicle body.